St Mary's Sound wave
buoy daily averages for Nov 2023 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
5 ft
1.8 — 9.8 ft
Average Wave period
5 secs
4.4 — 7 secs
Average Wave Direction
SW
Average Water temperature
13 °C
12.4 — 13.6 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 6.6 | 5.1 | E | 12.4 | |
| 1.8 | 5.6 | WSW | 12.5 | |
| 2.5 | 5.4 | W | 12.5 | |
| 3.3 | 4.7 | SSW | 12.5 | |
| 3.3 | 4.4 | S | 12.6 | |
| 1.9 | 4.4 | SW | 12.6 | |
| 2.1 | 4.8 | NW | 12.6 | |
| 2.4 | 4.7 | NW | 12.6 | |
| 1.8 | 4.4 | E | 12.6 | |
| 2.8 | 4.4 | N | 12.7 | |
| 5.4 | 5.4 | W | 12.7 | |
| 7.3 | 5.9 | SW | 12.8 | |
| 6.8 | 5.3 | SSW | 12.8 | |
| 4.6 | 5.2 | SSW | 12.8 | |
| 7.1 | 5.9 | SSE | 12.8 | |
| 4.3 | 5.5 | SW | 12.8 | |
| 6.5 | 5.9 | SW | 12.9 | |
| 8.1 | 6.1 | SSW | 12.9 | |
| 6.9 | 6 | SSW | 12.8 | |
| 4.6 | 5.3 | SSW | 12.9 | |
| 5.8 | 5.6 | W | 12.9 | |
| 7.1 | 5.8 | SW | 13.0 | |
| 7.7 | 6.1 | SSW | 13.1 | |
| 3.9 | 4.8 | W | 13.1 | |
| 5.1 | 5.6 | WSW | 13.1 | |
| 7.1 | 6.3 | SW | 13.2 | |
| 8.2 | 6.3 | SSW | 13.4 | |
| 5.7 | 6 | WSW | 13.5 | |
| 9.0 | 7 | SSW | 13.5 | |
| 9.8 | 6.4 | SSW | 13.6 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.